Drain-valve trap



E. S. STOTTS.

DRAIN VALVE TRAP.

APPLICATION man JuLY so, 1921.

l1,396,0'77, Patented Nov. 8, 1921.

Yprovide means for "q Specification of Letters Patent. Patented NOV. 8, 1921.

Substitute for abandoned application Serial No. 833,811, led March 31, 1914. This application led `.Tuly 30, 1921. Serial No. 488,698.

To all wom t may concern.'

e it known thatl I, ELZA S. Srorrs, a citizen of the United States of America, and resident of Des oines, Polk county, Iowa.

ave invented a new and useful Drain-Valve Trap, of which the following is a speciicaan interiorly threaded opening between the tion. chamber 11 and port 14, and a drain valve An object of this invention is to provide 20 is screwed therein. an improved drain-valve trap for steam ines and especially adapted for use in raildescribed and claimed in Letters way passenger equipment. the United States N further object of this invention is to to me on June 27, 1911, to wh manually draining a reference hereby is made. It is th steam line in addition to the automatic of t draining otherwise provided. y invention consists *formed with a rabbet 16a tie reception of the valve 18, and the bushmg 19 is shouldered to insure tight iit of the valve thereon.

The bottom of the body 10 is formed with at its upper end for interiorly threaded opening' 21 is mg, 1n which` formed in the top of the Figure 1 is a plan of the trap detached. a above the drain valve 2O valve and closing plug being removed. Fig. th 2 is an end elevation of the same. Fig. 3 is a ing normally is closed by a screw longitudinal vertical section of the complete permits cleaning and clearing of evlee, the steam pipes whenever desired, irrespeccomprises 'Y form and In such event the steam passes over the valve 20, through the passage 16 to the port 14, and thence out through the drain pipe.

e valve 18 normally is kept closed.

he location of the drain valve 2O on the and steam to blow over said drain valve when lthe valve 18 is opened, renders the trap cleaning,I as all sediment not carried through the drain valve is carried off through the opening 16. The drain valve need never be removed for the purpose of cleaning, as is frequently necessary with the ordinary type opening 17 is formed of trap.

' I claim as my invent1on` A self-cleaning drain-valve trap, compris ing a body formed with a. chamber closed at one end, an entrance opening from the eX- terior of the body directly to said chamber at its opposite end, an extension on said c ownward extension 13 on its bottom formed the chamber 11 to the of th and close the said opening 16. `9 is screwed in the o a seat for the valve 18,

self

` 5 opening body drain valve formed with a port, an exit opening an automaticJ yin alnement with said eXlt opening, an

in said body above and 1n ahnement wlth said drain Valve, means :for clos- VingY the latter opening, and

a valve-concontrolled passage between said chamber and port 'at one side of said drain Valve and adjacent the closed end of Said chamber. l0 Signed at Des Moines, n the county of Polk'and State of Iowa, this 27th day of July, 1921.

-ELZAi S. STO'IYIS.V 

